Oomph (6)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">oomph</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for energy that I've seen before include "Vitality, get-up-and-go" , "Power; capacity for work" , "life" , "Vigour, vim, vitality" , "Go green, possibly with envy, ultimately" .)
(Other definitions for zest that I've seen before include "Zing" , "Orange or lemon peel" , "Enthusiasm or outer skin of citrus fruit" , "Piquancy (eg from lemon peel)" , "Outer layer of citrus peel" .)